When I try to use an external hard drive, problems such as not recognizing it or not loading it may occur suddenly one day.While an external hard drive is a portable device, it is also one of the most delicate recording media.I could use it without any problems until yesterday, but today when I connect to my computer, the external hard drive doesn′t recognize it, I can′t access the data inside to watch photos or videos after a long time, and the external hard drive doesn′t respond.If the external hard drive is not recognized or loaded, there may be a variety of causes, and if something goes wrong, you should be careful.Here are some troubleshooting and cause-specific recovery options that you can try when an external hard drive is not recognized.
Table of Contents
1. Examples of symptoms that occur when an external hard drive is not recognized or read
2. Two things you want to do as soon as the external hard drive becomes unrecognized.
3. What is the reason for the external hard drive not being recognized?
4.Examples of probable causes when external hard drives become unrecognized
5. What can I do if an external hard drive is not recognized?
6. If the external hard drive is powered on but not recognized
7. What to do if an external hard drive is not detected (in the event of a logical failure)?
8. What to do if an external hard drive is not detected (in the event of a physical failure)?
9. What should not be done when an external hard drive is not recognized?
10. Summary - In case of trouble
Examples of symptoms that occur when an external hard drive is not recognized or read
When external hard drives are not recognized or read, the following symptoms are often present.
External hard drive does not work/does not work after power on
The power lamp is on, but there is no moving sound and it does not respond.
Does not recognize/read external hard drive when connected to PC
Cannot access files on external hard drive · Folder does not open
External hard drive will not power on and lamp will not light up
hear noises such as well as clattering noises
Error messages such as ′Must be formatted′ and ′Data error (Circular Redundancy Check (CRC) error).′
′E: is not accessible.Access denied.′ and other error messages appear.
The model number comes out, but I can′t see the data inside. I can′t open the file.
No Icon on My Computer
↓ If the hard drive is making noise, refer to this section as well.
AT DATA RECOVERY MEDIUM
Learn why the hard drive (hard drive) is making noise and how to recover it.
https://www.adte.jp/rec/hdd/post-659/
Have you ever had a problem with the sudden noise coming from your hard drive that you′ve never heard of before?Have you ever experienced noise that caused the hard drive to not recognize it, lost access, or had trouble using the stored data?
Two things you want to do as soon as the external hard drive becomes unrecognized.
If the external hard drive is not recognized or read, start with the following:
Solution 1.Turn off the external hard drive
Workaround 2. Unplug the cable to prevent it from energizing.
If something goes wrong with your hard drive, you should start by turning it off.Continuing to power on, turning off, rebooting, and reseating cables can make the situation more serious, and things that have been recoverable may end up in an unrecoverable.First, turn off the equipment and check and prepare for proper response.
[National Response] For free data recovery consultation, click here.
If the external hard drive is not detected, what is the cause?
There are three main causes of problems such as external hard drives not being recognized.
Cause 1. External hard drive has failed physically
Cause 2. External hard drive has a logical failure
Cause 3. USB cable, AC adapter and other accessories are broken
Cause 1. External hard drive has failed physically
A physical failure is a failure caused by a physical failure or damage to a recording medium, such as an external hard drive or a hard disk inside a personal computer.A hard drive is a precision instrument made up of many parts that can cause symptoms and problems if a part breaks or fails.In the event of a physical failure of a hard drive, it is difficult to respond or restore on its own, and it should be left to a professional.This is because, in order to repair a failed HDD and recover data, 高度 advanced technical capabilities 深い deep expertise 互換 procurement of compatible parts クリーン working in a dedicated environment such as a clean room, etc., these four are essential.If you spend even one of the four, it may not be possible to recover itself, the restoration time will be prolonged, and the restoration fee will be piled up.Also, if you choose a restoration company without thinking about it and request it, the situation may only get worse.Let′s be careful.
·Examples of external hard drive physical failure
Hard drive failure / internal parts / board failure / damage / scratches / grooves on platter / ageing deterioration / submergence / power outage / lightning strike / fall / HDD vibration / shock / external hard drive disconnected / external hard drive incorrectly inserted / noise / static / thermal runaway / ′not accessible.Data error (Circular Redundancy Check (CRC) error) and error messages such as ′Must be formatted′ are displayed.
↓If you are having trouble dropping or dropping your hard drive, click here.
AT DATA RECOVERY MEDIUM
HARD DISK DRIVE (HARD DISK) RECOVERY METHOD WITH FALLING IMPACT
https://www.adte.jp/rec/hdd/post-1530/
The external HDD, which is easy to carry around, is also a device that has a high risk of impact, such as falling from the desk or falling from the inside of the bag.Here are some things to watch out for when a hard drive containing important data is dropped or dropped, and how to recover it.
Cause 2. External hard drive has a logical failure
Logical failure refers to a failure that occurs when a hard drive or computer itself is not faulty, but when a program is damaged or a problem occurs, or when a file system or data is corrupted.Continuing to power, continuing to operate, and repeatedly turning on and off the power when a hard drive is experiencing a logical failure increases the risk of data loss, such as data overwriting, deteriorating conditions, or physical failure.Restoration itself may become difficult, so let′s stop and try not to worsen the condition.In the event of a logical failure, advanced analysis, high technical capabilities (with AI technology and proprietary technology), deep expertise, and file system repair technology are essential.If you download or scan free software or paid software, the data will often be overwritten.If your data is important, don′t do anything and talk to a professional recovery company.
·Examples of the cause of logical failure of external hard drives
Error messages such as accidentally erased/initialized/program file corruption/file system corruption/external hard drive could not be removed/cabled/deleted data/file due to malfunction/degraded/partition size incorrectly/cRC error/formatted/virus/infection program corruption/blackout.
Even though the hard drive itself is recognized, there are many cases where the file name has changed, folders and files cannot be opened, and garbled characters are also caused by logical failures.
↓ What is a CRC error? If you are having trouble getting an error message, please refer to this as well.
AT DATA RECOVERY MEDIUM
What is CRC error (Circular redundancy check error)? Introduce repair methods and causes!
https://www.adte.jp/rec/hdd/post-1049/
Some of you may be confused when you see a data error while using your computer.CRC errors (cyclic redundancy check errors) can occur when reading and writing data on recording media such as hard drives, USB memory, and SD cards.When CRC errors appear, be aware that the hard drive may experience severe symptoms or failures.In order not to lose the important data you have saved, here are some things you would like to know when CRC errors occur and how to repair them.
·For those who want to determine whether the external hard drive failure is a physical or logical failure
If the external hard drive is not recognized or loaded, it is assumed that a physical or logical failure has occurred.It is difficult for individuals to identify obstacles, and if they proceed recklessly, not only will the condition deteriorate, but it may also lead to difficulties in recovery itself.If you have any difficulties or concerns, let′s prioritize using free consultation from data recovery companies.It will prevent you from regretting it.
Cause 3. USB cable, AC adapter and other accessories are broken
Even if the hard drive is OK, it often causes damage or failure to the power transmission area, such as a USB cable or AC adapter, which causes the hard drive not to recognize it.Repeated reseating of the USB cable will lead to poor contact, deterioration of the board, and failure.Also, there are many cases where the cable itself is disconnected or broken due to aging.If the power is unstable or insufficient, the operation of the hard disk will become unstable.As a result, external hard drives may not recognize it or read it may cause problems.In addition, the connection part of the computer to which the external hard drive is connected may be faulty, leading to symptoms.
Specific examples of possible causes of external hard drives becoming unrecognized
If the external hard drive is not recognized, there are many possible causes.Cause 1. Hard drive failure or AC adapter damage
Cause 2. Lack of power
Cause 3. USB cable is not plugged correctly · Bad connection
Cause 4. Problems on the connected PC side
Cause 5. Impact of other peripherals
Cause 6. Bad driver on PC
Cause 7. Data and file system corruption (logical failure)
Cause 8. Disk itself failed (physical failure)
If you suspect that the above 1-6 is occurring, the following items may resolve the issue:
[National Response] For free data recovery consultation, click here.
What can I do if the external hard drive is not recognized?
Learn what you can do when an external hard drive is not recognized.
Workaround 1. Verify the Power Lamp Is On and the AC Adapter Connected
Workaround 2.Try Reseating the Cable
Workaround 3. Turn the power on and off
Workaround 4.Change your PC
Workaround 5.Replacing Cables and AC Adapters
Solution 6.Reduce the number of equipment
Solution 7.Update Driver
Workaround 1. Verify the Power Lamp Is On and the AC Adapter Connected
If the external hard drive is not recognized, proceed with the verification process.
①Is the power lamp on?
②Is the AC adapter plugged into the wall outlet?
If the power lamp is not lit, it may be a result of a problem with the power supply due to damage to the AC adapter or poor connection, as well as a failure of the hard drive and housing.In particular, external HDDs that are stationary for recording television programs, etc., may cause problems such as not recognizing or not working if the power distributed from the AC adapter is insufficient.Re-check to see if the AC adapter is firmly seated in the hard drive or if the AC adapter plug is plugged into the wall outlet.If you are using a power tap, you must also check the plug on the power tap and check if the switch is off.The power switch may not be on, or the AC adapter may be disconnected or coming off, causing problems.
·Use a genuine AC adapter
For external HDDs of stationary type (such as large capacity data storage and fast data transfer for TVs), AC adapters are often used to provide power.If the number of AC adapters increases, it is not uncommon to accidentally connect different AC adapters.Occasionally, it happens that Jack fits.However, the output varies depending on the AC adapter, so if you insert a different AC adapter, the external hard drive will not turn on or recognize it.Even if the power is turned on, it can cause the hard drive to fail because of excessive current flow.The AC adapter should be a genuine product and the one that was originally included.If by any chance you notice that you inserted a wrong AC adapter, it is important not to touch it any more.The situation will get worse by reseating it in other AC adapters.In some cases, it can become serious to the point where it cannot be restored again.If you have any difficulties or concerns, give priority to consulting a professional data recovery company.
·It is also important to check the wall outlet.
If a computer, TV, lighting, air conditioning, etc. are powered by a single AC tap or are wired to a kite foot, it may cause problems such as not recognizing, not responding, and not being able to read data due to lack of power.In the event of symptoms or problems, it is also important to plug only the equipment you want to operate into the wall outlet so that you don′t have to worry about power shortages.
Workaround 2.Try Reseating the Cable
It is also possible that USB cable damage or poor connection may cause problems such as not recognizing external hard drives when connected to a computer.If the external hard drive power lamp is on, but the computer does not recognize it, try reseating the cable only once.If the USB cable is not properly inserted into the USB port on the computer side, or if there is a bad connection, reseating may solve the problem.However, you must not go there again and again.When the cable is reconnected, energization occurs.Similar to power-on and power-on, the head in the hard drive often moves (like a needle to read data) and may come into contact with a part called a platter that stores the data when the head moves, and if the platter is damaged, it will not be restored.As a result of doing things that are easy to do, such as reseating the cable, it is often impossible to recover from the situation that was originally recoverable quickly and cheaply.Do not attempt to reseat the cable repeatedly if you are experiencing symptoms such as an external hard drive not recognizing it.
↓ If you wish to recover data from an external hard drive, please refer to this page.
AT DATA RECOVERY MEDIUM
Learn how to recover and restore data on an external hard drive!Solutions that you can do!
https://www.adte.jp/rec/hdd/post-2360/
External hard drives may suddenly become unrecognized or inaccessible, and may fail due to aging.This section describes how to recover and restore data, along with the causes and failures of external hard drives.
·Do not use USB hubs
If the external hard drive is a portable (portable) type, use a USB hub may be a problem due to low power, so instead of using a USB hub, make sure that the external hard drive is detected directly by connecting the computer.It is also important to visually check the cable for twisting and disconnection.
·Use the cable that was originally included with the external hard drive
Some power-intensive hard drives use two-pronged cables, so if you′re using anything other than the original accessory, try putting it back and see if the hard drive is recognized.It may be caused by a lack of electricity that leads to an unrecognized situation.
Workaround 3. Turn the power on and off
If the external hard drive is not dropped, vibration is not applied, or deterioration over time, turn the power on and off only once.You may return to a recognizable situation.However, you must not try again and again.If the external hard drive is not recognized or loaded, the hard drive itself is already faulty or experiencing physical problems, and as a result of doing things that are easy to turn on and off, you often end up in an irreversible situation.Be careful not to turn the power off again and again as it can be a very burdensome act on the equipment.
Workaround 4.Change your PC
If the external hard drive is not recognized, the problem may be with the computer connected instead of the hard drive, leading to symptoms.Connect to a different PC than the one that the external hard drive did not recognize when you had multiple PCs or had trouble in your company.If an external hard drive is detected by connecting to another computer, it can be determined that the problem was with the computer, not the hard drive.However, when you try to connect to another PC, you should avoid trying multiple computers.If you plug in and out the USB cable many times, it will be energized each time, so it may be as heavy and serious as turning off the power.When using another computer when the external hard drive connected to the computer is not recognized, keep it down to about one.You should avoid trying to reconnect many computers.
·Try connecting to another USB port
One solution is to always connect an external hard drive to the USB port of the same computer and try to connect it to a different USB port when reseating the cable.It is also possible that the USB port on the computer side is deteriorating or malfunctioning, causing external hard drive not to load.
·Use an AC adapter instead of a battery when connecting an external hard drive to a laptop
Notebooks may run out of power from the USB port when running only on batteries.If you connect an external hard drive to your laptop and don′t recognize it, switch your laptop to AC adapter instead of battery life.
Workaround 5.Replacing Cables and AC Adapters
External hard drives may not be recognized or powered on even if the USB cable or AC adapter is faulty or faulty.Let′s take a closer look and see if the line is disconnected, broken, or bent.If you have more than one USB cable, you can determine if the hard drive or USB cable is causing the problem by replacing it.If you step on a cable at a desk or chair, the wire will break.Folding also puts a burden on me.If you have multiple cables, let′s replace them and see if they turn on.It is important to make sure that the AC adapter is compatible, such as power, before connecting.If you connect an incompatible cable or AC adapter, the hard drive may be completely damaged.If the external hard drive does not detect it after trying other compatible cables or AC adapters, it is assumed that the hard drive itself is faulty.If you force yourself to buy a new one and try it, it can be wasted or the condition of your hard drive deteriorates, so avoid trying it when you don′t have any spare.
Solution 6.Reduce the number of equipment
After connecting or adding a new peripheral device other than an external hard drive to your computer, you may not be able to recognize the external hard drive that you were originally using.In that case, try reconnecting the external hard drive after removing all other peripherals.When this can be resolved, it can be thought that other peripheral drivers have caused the problem.If you are reconnecting, you may need to do the following:①Reconnect Change the USB Port
②Remove and Reinstall Peripheral Drivers
③Keep peripheral drivers up-to-to-date
Solution 7.Update Driver
When connecting an external hard drive to a PC, if the driver remains out of date, it may cause malfunction and cause problems such as not recognizing it.Also, if you are using a Windows computer, Windows updates are performed periodically, and external devices such as external hard drives and USB memory may become unrecognizable after remediation.If you are using a Mac computer, the driver may be damaged even after installing the application, and the external hard drive may not be recognized.If a problem occurs after Windows Update or after installing a new application, updating the driver to the latest version may easily resolve the problem.If you don′t know how to update your drive, please proceed to the next section for further explanation.
External hard drive is powered on but not recognized
If the external hard drive lamp is on and appears to be powered on, but the computer does not recognize it, try using Device Manager to make sure the hard drive is detected correctly.
·How to check external hard drive status using Device Manager (Windows 10)
①Right-click the Windows mark at the bottom left of the screen → Select Device Manager
②Double-click Disk Drive and Universal Serial Bus Controller
③The drive appears if the hard drive is recognized correctly by the computer.
In Device Manager, when a hard drive is detected but data cannot be accessed or folders or files cannot be opened, a logical failure occurs, and a driver failure, duplication or change of drive letters, can be assumed to be causing symptoms.
·If the external hard drive is not displayed in Device Manager,
①Device Name Does Not Appear in Device Manager Screen
②The name of the device is preceded by ′Surprise Mark,′ ′!′ ′Hatena Mark,′ and ′?′
When checking the status of the external hard drive using Device Manager, if there is a problem such as の or 自体, the device itself cannot be loaded correctly on the computer, and the device is not working properly.
デバイス If the external hard drive is not displayed in Device Manager, the disk itself is often out of order, and it is often irreversible just by turning on the power or reseating the cable.The top priority is to remove the disk immediately from the computer to prevent it from deteriorating.
·4 examples of troubleshooting that can be tried when an external hard drive is not displayed in Device Manager
Windows computers are regularly updated.External devices such as external hard drives may become unusable after remediation.If you do not see the equipment in Device Manager, you will need to take the following actions:
①Update and reinstall drivers
②Uninstalling Updates
③Performing System Restore
④restore to its initial state
デバイス If the device manager does not recognize the external hard drive or the device name is not displayed, it is necessary to consider taking action from ~ to の, but these actions are dangerous acts that can cause the stored data to be lost, so be careful.Proceed only if you have received sufficient backups in advance.If, by any chance, there are even a few factors of concern, such as not getting a backup or not getting enough, it is better to prioritize consulting with a professional data recovery company without forcing it.In particular, if you restore the system or restore it to its initial state, the data stored on your computer will disappear, so be careful not to make it easy.
·How to update driver software to the latest version using Device Manager
Update the driver to the latest version when the external hard drive is properly recognized.
①Right-click the Windows mark at the bottom left of the screen → Select Device Manager
②Double-click Disk Drive and Universal Serial Bus Controller
③Right-click the driver listed.
④Select ′Update Driver Software′ to perform the update
·How to check the status of an external hard drive in the disk utility (for Macs)
①Launch Finder
②Click Move from the top menu
③Click Utilities
④Select Disk Utility to Boot
⑤The drive appears if the hard drive is correctly recognized by the Mac.
[National Response] For free data recovery consultation, click here.
What to do if an external hard drive is not recognized (in the event of a logical failure)?
If you are aware of the external hard drive itself, but you may not have access to the files or folders that you have stored, and you are confident that your file system or data is corrupted or that you are not experiencing a physical failure, you may want to try the following:
Workaround 1. Use CHKDSK command to repair
Workaround 2. Change Access Permissions
Workaround 3. Eliminate duplicate drive letters
Workaround 4. Formatting
Workaround 5. Use data recovery software
Workaround 1. Use CHKDSK command to repair
If an external hard drive connected to a Windows 10 or Windows 11 computer is not recognized, a ′command prompt′ may be used for repair and recovery.
·Procedure to repair the disk using CHKDSK (Windows 10)
①Type cmd in the search box to the right of the Windows mark.
②View search results and right-click Command Prompt
③Select Run as Administrator → Open command prompt screen
④Enter the chkdsk external hard drive name d:/F on the command prompt screen.
⑤wait for a while
⑥Repair completed
CH CHKDSK (check disk) refers to the ability to repair the file system.If the file system on the disk fails or is damaged, this CHKDSK may return to normal operation, but CHKDSK rewrites the error area and discards any data that cannot be repaired.You should also be careful because if the data itself fails, the data disappears.If the data stored on the hard drive disappears, disappears, or cannot be taken out, even a little bit of a problem occurs, you should give priority to consulting a professional data recovery company before doing CHKDSK.You can prevent failure.
論理 If CHKDSK is performed when there is a physical failure on the disk instead of a logical failure, the situation will become serious.CHKDSK itself often takes about 30 minutes to complete, and during that time, the disk continues to be loaded, resulting in severe failures and complete breakdown of broken objects, which can lead to regret.If you want to restore it quickly and cheaply, don′t try it easily.
↓ If you want to retrieve data from your hard drive, please refer to this as well.
AT DATA RECOVERY MEDIUM
What do I do when I want to retrieve data from a failed hard drive?
https://www.adte.jp/rec/hdd/post-1307/
Hard drives are the most prone to failure among server components such as personal computers and NAS.A hard drive is one of the recording media that stores important data, and if it is broken, data can be lost, so be careful when handling it.Here′s how to retrieve and troubleshoot data in the event of a hard drive failure.
Workaround 2. Change Access Permissions
The model number appears, but I can′t see the data inside, I can′t open the file, Icons appear on my computer, but I can′t access it, and if I get an error message ′Access Denied′, I may be able to fix the problem by changing my access privileges.You can change the settings screen and access privileges using the following methods:
業務 When using a company-owned PC for business, the HDD itself may not be accessible even if it is recognized.If you do not have access, you will not be able to connect, so contact your system administrator for equipment owned by your company.
·How to change access rights (Windows)
①Right-click the file or folder where you want to change access privileges.
②Displayed menu → Select Properties → Select Security tab
③Select the name of the group or user you want to change permissions for.
④Click Edit
⑤Group name or username field → Click the account you want to allow access to
⑥Check the items you want to allow access from the permission field → Press OK
⑦Uncheck items that you want to grant permission to when a deny item is checked.
⑧Access rights are changed
·How to change access rights (macOS)
①Apple Menu → Click ′System Preferences′ → Select ′Security and Privacy′ →
②′Select ′′Files and Folders′′ from the contents displayed on the left′·Click
③Check the permission field for access to files and folders to the application below → Check the check box under the application you want to grant access to
④be granted access to files and folders
Workaround 3. Eliminate duplicate drive letters
When an external hard drive is connected to a computer, a drive letter (drive letter) such as E or H is assigned.If you use or reseat multiple peripherals on your computer, the drive letters (drive letters) may be duplicated or misaligned and may not be recognized correctly.Disk management is used to edit and restore drive letters.·How to change the drive letter (Windows)
①Click Windows Mark → Application List → Windows Management Tools → Computer Management → Disk Management in the Storage column
②Right-click the drive you want to change → Click Change drive letter and path → Select drive letter you want to change → Click Change
③Drive Letter or Path Changes Appear → Click Assign Next Drive Letter → View the list and click the drive letter you want to assign → Press the OK button
④Some programs that depend on the drive letter may not work properly.Message displayed → No problem determined → Press Yes
⑤US>Return to Computer Administration to see if the drive letter has changed and complete
The drive may not be recognized and an error message will be displayed when the image is imported to an external hard drive ·When the OS is automatically backed up to an external hard drive, the drive may not be recognized.Basically, you can choose any drive letter as long as it doesn′t overlap.If you change the drive letter, check the settings of the image capture software and the backup software again, and do the necessary designation.Duplicate drive letters are one of the most common problems with external HDDs (NASs) used on the network.Editing a drive letter is a workaround that also includes the risk of data never being recovered if you make a mistake.If you have any concerns, stop and contact a company specializing in data recovery before proceeding.
Workaround 4. Formatting
When connecting an external hard drive to a computer, the disk icon may appear but the contents may not open.In particular, when you try to use a new external hard drive made overseas, you may not recognize it because it has not been initialized.
·If the new external hard drive is not recognized, check if it has been formatted.
Format (initialize) if you haven′t saved any data on an external hard drive yet or if you don′t recognize it when it′s connected to your computer while it′new state.
·How to check if a new disk is formatted
①Click on an external hard drive folder → Access it
②Determine if the Error Message ′Drive Not Accessible′ or ′Disk Not Formatted′ Appears
*If an error message is displayed in で, it will be a sign that requires initialization and formatting.
·Failure sign if formatting error is displayed on external hard drive in use
①′It needs to be formatted.Formatting? (Windows Error Message)
②′The disk I set was a disk that this computer could not read.′ (macOS error message)
データ If an error message of ② or の is displayed when connecting an external HDD storing data to a PC, the disk itself will be a sign of failure.If you format and initialize in this state, all the data inside will disappear, so be careful not to do so.In the unlikely event that you format it incorrectly, you should consult with a professional data recovery company immediately without unnecessary action.
↓ If you are having trouble with the error message ′You need to format it′, please refer to this as well.
AT DATA RECOVERY MEDIUM
It must be formatted.Here′s how to deal with errors!
https://www.adte.jp/rec/hdd/post-862/
When connecting an external hard disk, SD card, USB memory, etc. to a PC, the error ′Must be formatted′ or ′Do you want to format?′ may appear.Don′t panic if you can′t see the data stored on an external hard drive without opening the drive.If you see the error ′Must be formatted′, we will show you how to recover and resolve the data.
·When you want to format the data in the external HDD without needing it
After the error message is displayed, if you don′t need the data in the disk and you want to return to the device itself to work, or if you want to format a new external hard drive, you can initialize it using the following methods:
·How to format and initialize an external hard drive (Windows)
①Right-click the Windows mark
②Select Disk Management
③Right-click an external hard drive from the window provided.
④Select ′Format
フォーマット Formatting and initialization refers to the work of restoring the equipment to its original factory condition.Formatting may cause unrecognized disks to return to operational status, but you should be careful because more often than not.Also, if you format it, all the saved data will disappear, so don′t try it if there is a possibility that there is at least one file or folder you need.
·How to format and initialize an external HDD (macOS)
①Launchpad→Other→Launch Disk Utility
②Select the volume you want to format from the sidebar
③Click Clear → Select Format
Workaround 5. Use data recovery software
If the external hard drive is not recognized and the cause is only mild logical failure, data recovery software can be used to resolve the problem.However, when external HDDs are not recognized or read, there are many cases where there are more than moderate logical or physical failures.It is often difficult for individuals to determine the degree of disability (mild, moderate, or severe) and the type of disability (logical or physical), and if they use recovery software easily, they may end up in an irreversible situation.If the data you have saved is important, if you can′t retrieve it or recover it, you don′t want to fail, you want to reduce costs, solve problems quickly, and minimize business disruptions, you should stop trying the recovery software.If you really want to use the recovery software, consult a professional data recovery company before proceeding.
·Examples of how to use restoration software
①install recovery software on one′s computer
②open recovery software
③Select the hard drive you want to recover
④Click Scan → Files Scanned
⑤Preview Discovered Files
⑥Select the data you want to recover → Click the restore button, recovery button, etc.
⑦verify restored data
·Examples of restoration software
Examples of free recovery software Examples of paid versions of recovery software Examples of OS support
Recuva/iSkysoft/Disk Digger/PC Inspector File Recovery/Recoverit/EaseUS Data Recovery Wizard/testdisk/Mini Tool Photo Recovery Free/Pandora Recovery/ AVIPreview/Recover Files/Restart Explorer/MMname/Photo Rec/ZAR（Zero Assumption Recovery）/Glary UndeleteSFWare Video Repair/DivFix/WMVConcat/VLC Media Player/ AviFIXP/4DDiG/DVDVob2Mpg/Stellar Repair for Videoなど Disk Drill/iSkysoftPaid/EaseUS Data Recovery Wizard, Recoverit Paid/SFWare Video Repair/Data Recovery/restore.media/Renee Undelete, Windows/macOS (iOS)/Linux, etc.
· Advantages and disadvantages of using data recovery software
advantages of using softwaredisadvantages of using software
Recovery software can′t be used in the first place due to aging or physical failure, such as easy to use/cheap to restore, often deteriorates as a result of using software/using software/scanning data/using software/using software to recover completely/restore files/restore files.
Avoid using the recovery software if you are worried that the data stored on an external hard drive is important, that you can′t retrieve it, that you can′t recover it, or that you don′t want to fail.The disadvantages of trying recovery software are more noticeable than the advantages.Just installing the software can have a negative effect.It is important to stop when you are looking for software and when you are having trouble or worry even if you scan halfway.If you have any concerns, consult a professional data recovery company.You don′t have to regret it.
What to do if an external hard drive is not detected (in the event of a physical failure)?
The external hard drive′s power lamp is on, but it is not recognized on the connected computer, clicking noise, not working, dropping the hard drive, suspected aging of the hard drive, etc., should be careful.When an external hard drive becomes unrecognized, it is overwhelmingly a physical failure, not a logical failure.Error message displayed ·Icons appear, but files and folders do not open, and many symptoms that tend to be considered logical failures can be physical failures, and logical failures and physical failures can occur together.
↓ If the hard drive has an error or a message appears, please also check the corrective action.
AT DATA RECOVERY MEDIUM
HARD DISK ERROR CHECKING AND RECOVERY METHOD
https://www.adte.jp/rec/hdd/post-1218/
Have you ever been confused by an error on your computer while using a hard disk?If a hard disk fails, such as ′A hard disk problem has been detected,′ don′t panic and check one by one.This section describes how to repair an error message when using a hard disk or when an error is detected.
·What to do if you think that an external hard drive is experiencing a physical failure?
Workaround パソコン Remove the external hard drive from the computer
Workaround 電源 Turn off the power
Solution データ Contact the data recovery and repair company
If you have important data on your disk, you don′t want to take it out safely, you don′t want to fail, you want to solve the problem quickly, you′re concerned about the cost, you want to reduce recovery costs, and so on, give priority to using a free consultation from a professional data recovery company.
*If you send it to the manufacturer′s repair, you should be aware that the equipment is usually initialized or replaced with a replacement, and that the data will not be rescued or disappeared.Also, when you request a manufacturer repair, you may need to wait weeks or months for the equipment to be returned to you, so if you want to solve the problem quickly, you should prioritize consulting a data recovery company first.
·How to select a data recovery company
If you need or want to rescue data from external hard drives that are not recognized or read, we recommend that you choose a way to resolve the problem by consult a professional data recovery company.When you consult with a data recovery provider, you have deep expertise and advanced technology to identify the cause, type, extent, and location of the symptom, and to be able to respond to logical or physical failures.However, there are many companies that provide data recovery services, so you may be worried about which company to consult.In such a case, let′s check the following points before choosing.
①Does the organization have proprietary or AI technology (a guide with advanced technology)?
②What is the speed of recovery and how long does it take to work?
③Is the fee plan and restoration fee example listed on the website?
④Does the organization have a dedicated environment such as a clean room?
⑤Are information confidentiality obligations and security measures thorough?
⑥Whether or not there are any restoration results or cases
Not all recovery companies can do the same.Please be careful not to choose easily because it′s close to your house or company.There is also a big difference in technical capabilities and service content from company to company to company.By any chance, if you send it to a company without technical capabilities, not only will it be difficult to solve the problem, but it will not be able to recover, and the condition may deteriorate.Advanced Technology is a data recovery service company that meets all of the points ~ through の.With AI technology and proprietary technology, we are able to respond quickly and restore data at a low cost thanks to our advanced technology.I feel safe because I have a lot of experience with various recording media such as HDD, NAS, and SSD.
[National Response] For free data recovery consultation, click here.
What to Do When an External Hard Drive Is Not Recognized
Even if the external hard drive is not recognized or the PC is not loaded, in most cases the data remains on the disk.However, if you do the following things, things that could have been restored quickly and cheaply may end up in an unrecoverable situation.Let′s be careful.
Continuing to power on and repeatedly turning on and off the power supply is not allowed.
Repeated USB cable or AC adapter reseat is dangerous
Avoid connecting multiple PCs
Decomposition and opening are not allowed.
You can′t hit or shock.
Data recovery software is dangerous
Individual repair and restoration work is risky.
1. Continuing to energize · Repeated power-on/reboot is not allowed.
If the external hard drive is not recognized or loaded, パソコンRemove from the computer 電源Power off should be prioritized.If you leave it connected to the computer, the power will be turned on, and the disk may malfunction or overwrite.Also, if you repeat what you can do easily, such as turning off or restarting the power, the condition becomes serious and you often end up in an irreversible situation.
2. Repeated USB cable or AC adapter insertion and removal is dangerous
If the external hard drive does not load, you may often reseat the USB cable or AC adapter over and over again, but you should also be aware that this is a dangerous behavior.Reseating and reseating often causes fatal damage to the disk as well as turning it on and off.
3. Avoid connecting multiple PCs
If you have several PCs or if your company has many PCs that you can connect to, or if the external hard drive does not recognize it, you may try to connect to multiple PCs to see if the problem can be resolved.However, these actions are also very dangerous.Just like plugging in and out of cables or turning off power, don′t make it easy to try because it can be a disk-intensive operation that not only solves the problem but can also cause serious situations.
4. Decomposition and opening are not allowed.
The HDD is made up of a variety of components, and it is one of the most delicate precision instruments that makes it impossible to recover from dust or dust.Therefore, it is necessary to work in a dedicated environment such as a clean room to decompose and open.It′s the same image as performing human surgery in a special operating room.Attempting to dismantle and repair equipment such as HDDs outside of a dedicated environment can be a dangerous act that can cause serious conditions.Also, if you open it easily by yourself, it may not be covered by the manufacturer′s warranty. I want to check the cause of the trouble, and if I go ahead with the work recklessly to see if I can handle it myself, it will lead to regret.You should not take it apart or open it.
↓ If you would like to repair your hard drive, please refer to this as well.
AT DATA RECOVERY MEDIUM
Learn how to repair your hard drive and recover your data!
https://www.adte.jp/rec/hdd/post-914/
It is possible to determine if the hard drive is faulty due to symptoms such as an error message, noise, corrupt files, burning smell, and so on while using the hard drive.This section describes how to repair or repair a hard drive in the event of a hard drive failure.
5.You can′t hit or shock.
HDD is one of the precision instruments.Be careful not to give a shock when any symptoms or troubles occur.The situation will get worse soon.
6. Using data recovery software is dangerous / 7. It is risky to carry out repair and recovery work by individuals
If the external hard drive is not recognized, careful attention is required.In many cases, physical problems often occur, and the disadvantages are noticeable, such as overwriting the data if you use the data recovery software easily and having other symptoms.The more difficult it is to retrieve data, the more serious the situation can be, as a result of repeated easy-to-use activities such as power cycling, rebooting, and reseating cables.If you want to do what you can or want to try, give priority to stopping.If you really want to proceed with some work or operation, you can avoid regret by consulting a professional data recovery company.
Summary - In case of trouble
An external hard drive is one of the recording media that often causes problems such as not recognizing or reading.It is important to turn off the power when the hard drive has any symptoms.If you proceed with unnecessary operations or work, the data will disappear and it may become difficult to take out.There are many situations where it is impossible to recover just by turning on and off the power, restarting, and reseating the cable.If your external hard drive contains important data, wants to solve problems quickly, wants to reduce costs, worries about recovery costs, or doesn′t want to fail, don′t do anything unnecessary and consult a professional data recovery company.Advanced technology has its own technology and AI technology, and advanced technology for restoration and repair operations enables quick response and low-cost data recovery.I′m relieved because I have a lot of experience.If you are in trouble, why don′t you start with a free consultation?
Table of Contents
1. Examples of symptoms that occur when an external hard drive is not recognized or read
2. Two things you want to do as soon as the external hard drive becomes unrecognized.
3. What is the reason for the external hard drive not being recognized?
4.Examples of probable causes when external hard drives become unrecognized
5. What can I do if an external hard drive is not recognized?
6. If the external hard drive is powered on but not recognized
7. What to do if an external hard drive is not detected (in the event of a logical failure)?
8. What to do if an external hard drive is not detected (in the event of a physical failure)?
9. What should not be done when an external hard drive is not recognized?
10. Summary - In case of trouble
Examples of symptoms that occur when an external hard drive is not recognized or read
When external hard drives are not recognized or read, the following symptoms are often present.
External hard drive does not work/does not work after power on
The power lamp is on, but there is no moving sound and it does not respond.
Does not recognize/read external hard drive when connected to PC
Cannot access files on external hard drive · Folder does not open
External hard drive will not power on and lamp will not light up
hear noises such as well as clattering noises
Error messages such as ′Must be formatted′ and ′Data error (Circular Redundancy Check (CRC) error).′
′E: is not accessible.Access denied.′ and other error messages appear.
The model number comes out, but I can′t see the data inside. I can′t open the file.
No Icon on My Computer
↓ If the hard drive is making noise, refer to this section as well.
AT DATA RECOVERY MEDIUM
Learn why the hard drive (hard drive) is making noise and how to recover it.
https://www.adte.jp/rec/hdd/post-659/
Have you ever had a problem with the sudden noise coming from your hard drive that you′ve never heard of before?Have you ever experienced noise that caused the hard drive to not recognize it, lost access, or had trouble using the stored data?
Two things you want to do as soon as the external hard drive becomes unrecognized.
If the external hard drive is not recognized or read, start with the following:
Solution 1.Turn off the external hard drive
Workaround 2. Unplug the cable to prevent it from energizing.
If something goes wrong with your hard drive, you should start by turning it off.Continuing to power on, turning off, rebooting, and reseating cables can make the situation more serious, and things that have been recoverable may end up in an unrecoverable.First, turn off the equipment and check and prepare for proper response.
[National Response] For free data recovery consultation, click here.
If the external hard drive is not detected, what is the cause?
There are three main causes of problems such as external hard drives not being recognized.
Cause 1. External hard drive has failed physically
Cause 2. External hard drive has a logical failure
Cause 3. USB cable, AC adapter and other accessories are broken
Cause 1. External hard drive has failed physically
A physical failure is a failure caused by a physical failure or damage to a recording medium, such as an external hard drive or a hard disk inside a personal computer.A hard drive is a precision instrument made up of many parts that can cause symptoms and problems if a part breaks or fails.In the event of a physical failure of a hard drive, it is difficult to respond or restore on its own, and it should be left to a professional.This is because, in order to repair a failed HDD and recover data, 高度 advanced technical capabilities 深い deep expertise 互換 procurement of compatible parts クリーン working in a dedicated environment such as a clean room, etc., these four are essential.If you spend even one of the four, it may not be possible to recover itself, the restoration time will be prolonged, and the restoration fee will be piled up.Also, if you choose a restoration company without thinking about it and request it, the situation may only get worse.Let′s be careful.
·Examples of external hard drive physical failure
Hard drive failure / internal parts / board failure / damage / scratches / grooves on platter / ageing deterioration / submergence / power outage / lightning strike / fall / HDD vibration / shock / external hard drive disconnected / external hard drive incorrectly inserted / noise / static / thermal runaway / ′not accessible.Data error (Circular Redundancy Check (CRC) error) and error messages such as ′Must be formatted′ are displayed.
↓If you are having trouble dropping or dropping your hard drive, click here.
AT DATA RECOVERY MEDIUM
HARD DISK DRIVE (HARD DISK) RECOVERY METHOD WITH FALLING IMPACT
https://www.adte.jp/rec/hdd/post-1530/
The external HDD, which is easy to carry around, is also a device that has a high risk of impact, such as falling from the desk or falling from the inside of the bag.Here are some things to watch out for when a hard drive containing important data is dropped or dropped, and how to recover it.
Cause 2. External hard drive has a logical failure
Logical failure refers to a failure that occurs when a hard drive or computer itself is not faulty, but when a program is damaged or a problem occurs, or when a file system or data is corrupted.Continuing to power, continuing to operate, and repeatedly turning on and off the power when a hard drive is experiencing a logical failure increases the risk of data loss, such as data overwriting, deteriorating conditions, or physical failure.Restoration itself may become difficult, so let′s stop and try not to worsen the condition.In the event of a logical failure, advanced analysis, high technical capabilities (with AI technology and proprietary technology), deep expertise, and file system repair technology are essential.If you download or scan free software or paid software, the data will often be overwritten.If your data is important, don′t do anything and talk to a professional recovery company.
·Examples of the cause of logical failure of external hard drives
Error messages such as accidentally erased/initialized/program file corruption/file system corruption/external hard drive could not be removed/cabled/deleted data/file due to malfunction/degraded/partition size incorrectly/cRC error/formatted/virus/infection program corruption/blackout.
Even though the hard drive itself is recognized, there are many cases where the file name has changed, folders and files cannot be opened, and garbled characters are also caused by logical failures.
↓ What is a CRC error? If you are having trouble getting an error message, please refer to this as well.
AT DATA RECOVERY MEDIUM
What is CRC error (Circular redundancy check error)? Introduce repair methods and causes!
https://www.adte.jp/rec/hdd/post-1049/
Some of you may be confused when you see a data error while using your computer.CRC errors (cyclic redundancy check errors) can occur when reading and writing data on recording media such as hard drives, USB memory, and SD cards.When CRC errors appear, be aware that the hard drive may experience severe symptoms or failures.In order not to lose the important data you have saved, here are some things you would like to know when CRC errors occur and how to repair them.
·For those who want to determine whether the external hard drive failure is a physical or logical failure
If the external hard drive is not recognized or loaded, it is assumed that a physical or logical failure has occurred.It is difficult for individuals to identify obstacles, and if they proceed recklessly, not only will the condition deteriorate, but it may also lead to difficulties in recovery itself.If you have any difficulties or concerns, let′s prioritize using free consultation from data recovery companies.It will prevent you from regretting it.
Cause 3. USB cable, AC adapter and other accessories are broken
Even if the hard drive is OK, it often causes damage or failure to the power transmission area, such as a USB cable or AC adapter, which causes the hard drive not to recognize it.Repeated reseating of the USB cable will lead to poor contact, deterioration of the board, and failure.Also, there are many cases where the cable itself is disconnected or broken due to aging.If the power is unstable or insufficient, the operation of the hard disk will become unstable.As a result, external hard drives may not recognize it or read it may cause problems.In addition, the connection part of the computer to which the external hard drive is connected may be faulty, leading to symptoms.
Specific examples of possible causes of external hard drives becoming unrecognized
If the external hard drive is not recognized, there are many possible causes.Cause 1. Hard drive failure or AC adapter damage
Cause 2. Lack of power
Cause 3. USB cable is not plugged correctly · Bad connection
Cause 4. Problems on the connected PC side
Cause 5. Impact of other peripherals
Cause 6. Bad driver on PC
Cause 7. Data and file system corruption (logical failure)
Cause 8. Disk itself failed (physical failure)
If you suspect that the above 1-6 is occurring, the following items may resolve the issue:
[National Response] For free data recovery consultation, click here.
What can I do if the external hard drive is not recognized?
Learn what you can do when an external hard drive is not recognized.
Workaround 1. Verify the Power Lamp Is On and the AC Adapter Connected
Workaround 2.Try Reseating the Cable
Workaround 3. Turn the power on and off
Workaround 4.Change your PC
Workaround 5.Replacing Cables and AC Adapters
Solution 6.Reduce the number of equipment
Solution 7.Update Driver
Workaround 1. Verify the Power Lamp Is On and the AC Adapter Connected
If the external hard drive is not recognized, proceed with the verification process.
①Is the power lamp on?
②Is the AC adapter plugged into the wall outlet?
If the power lamp is not lit, it may be a result of a problem with the power supply due to damage to the AC adapter or poor connection, as well as a failure of the hard drive and housing.In particular, external HDDs that are stationary for recording television programs, etc., may cause problems such as not recognizing or not working if the power distributed from the AC adapter is insufficient.Re-check to see if the AC adapter is firmly seated in the hard drive or if the AC adapter plug is plugged into the wall outlet.If you are using a power tap, you must also check the plug on the power tap and check if the switch is off.The power switch may not be on, or the AC adapter may be disconnected or coming off, causing problems.
·Use a genuine AC adapter
For external HDDs of stationary type (such as large capacity data storage and fast data transfer for TVs), AC adapters are often used to provide power.If the number of AC adapters increases, it is not uncommon to accidentally connect different AC adapters.Occasionally, it happens that Jack fits.However, the output varies depending on the AC adapter, so if you insert a different AC adapter, the external hard drive will not turn on or recognize it.Even if the power is turned on, it can cause the hard drive to fail because of excessive current flow.The AC adapter should be a genuine product and the one that was originally included.If by any chance you notice that you inserted a wrong AC adapter, it is important not to touch it any more.The situation will get worse by reseating it in other AC adapters.In some cases, it can become serious to the point where it cannot be restored again.If you have any difficulties or concerns, give priority to consulting a professional data recovery company.
·It is also important to check the wall outlet.
If a computer, TV, lighting, air conditioning, etc. are powered by a single AC tap or are wired to a kite foot, it may cause problems such as not recognizing, not responding, and not being able to read data due to lack of power.In the event of symptoms or problems, it is also important to plug only the equipment you want to operate into the wall outlet so that you don′t have to worry about power shortages.
Workaround 2.Try Reseating the Cable
It is also possible that USB cable damage or poor connection may cause problems such as not recognizing external hard drives when connected to a computer.If the external hard drive power lamp is on, but the computer does not recognize it, try reseating the cable only once.If the USB cable is not properly inserted into the USB port on the computer side, or if there is a bad connection, reseating may solve the problem.However, you must not go there again and again.When the cable is reconnected, energization occurs.Similar to power-on and power-on, the head in the hard drive often moves (like a needle to read data) and may come into contact with a part called a platter that stores the data when the head moves, and if the platter is damaged, it will not be restored.As a result of doing things that are easy to do, such as reseating the cable, it is often impossible to recover from the situation that was originally recoverable quickly and cheaply.Do not attempt to reseat the cable repeatedly if you are experiencing symptoms such as an external hard drive not recognizing it.
↓ If you wish to recover data from an external hard drive, please refer to this page.
AT DATA RECOVERY MEDIUM
Learn how to recover and restore data on an external hard drive!Solutions that you can do!
https://www.adte.jp/rec/hdd/post-2360/
External hard drives may suddenly become unrecognized or inaccessible, and may fail due to aging.This section describes how to recover and restore data, along with the causes and failures of external hard drives.
·Do not use USB hubs
If the external hard drive is a portable (portable) type, use a USB hub may be a problem due to low power, so instead of using a USB hub, make sure that the external hard drive is detected directly by connecting the computer.It is also important to visually check the cable for twisting and disconnection.
·Use the cable that was originally included with the external hard drive
Some power-intensive hard drives use two-pronged cables, so if you′re using anything other than the original accessory, try putting it back and see if the hard drive is recognized.It may be caused by a lack of electricity that leads to an unrecognized situation.
Workaround 3. Turn the power on and off
If the external hard drive is not dropped, vibration is not applied, or deterioration over time, turn the power on and off only once.You may return to a recognizable situation.However, you must not try again and again.If the external hard drive is not recognized or loaded, the hard drive itself is already faulty or experiencing physical problems, and as a result of doing things that are easy to turn on and off, you often end up in an irreversible situation.Be careful not to turn the power off again and again as it can be a very burdensome act on the equipment.
Workaround 4.Change your PC
If the external hard drive is not recognized, the problem may be with the computer connected instead of the hard drive, leading to symptoms.Connect to a different PC than the one that the external hard drive did not recognize when you had multiple PCs or had trouble in your company.If an external hard drive is detected by connecting to another computer, it can be determined that the problem was with the computer, not the hard drive.However, when you try to connect to another PC, you should avoid trying multiple computers.If you plug in and out the USB cable many times, it will be energized each time, so it may be as heavy and serious as turning off the power.When using another computer when the external hard drive connected to the computer is not recognized, keep it down to about one.You should avoid trying to reconnect many computers.
·Try connecting to another USB port
One solution is to always connect an external hard drive to the USB port of the same computer and try to connect it to a different USB port when reseating the cable.It is also possible that the USB port on the computer side is deteriorating or malfunctioning, causing external hard drive not to load.
·Use an AC adapter instead of a battery when connecting an external hard drive to a laptop
Notebooks may run out of power from the USB port when running only on batteries.If you connect an external hard drive to your laptop and don′t recognize it, switch your laptop to AC adapter instead of battery life.
Workaround 5.Replacing Cables and AC Adapters
External hard drives may not be recognized or powered on even if the USB cable or AC adapter is faulty or faulty.Let′s take a closer look and see if the line is disconnected, broken, or bent.If you have more than one USB cable, you can determine if the hard drive or USB cable is causing the problem by replacing it.If you step on a cable at a desk or chair, the wire will break.Folding also puts a burden on me.If you have multiple cables, let′s replace them and see if they turn on.It is important to make sure that the AC adapter is compatible, such as power, before connecting.If you connect an incompatible cable or AC adapter, the hard drive may be completely damaged.If the external hard drive does not detect it after trying other compatible cables or AC adapters, it is assumed that the hard drive itself is faulty.If you force yourself to buy a new one and try it, it can be wasted or the condition of your hard drive deteriorates, so avoid trying it when you don′t have any spare.
Solution 6.Reduce the number of equipment
After connecting or adding a new peripheral device other than an external hard drive to your computer, you may not be able to recognize the external hard drive that you were originally using.In that case, try reconnecting the external hard drive after removing all other peripherals.When this can be resolved, it can be thought that other peripheral drivers have caused the problem.If you are reconnecting, you may need to do the following:①Reconnect Change the USB Port
②Remove and Reinstall Peripheral Drivers
③Keep peripheral drivers up-to-to-date
Solution 7.Update Driver
When connecting an external hard drive to a PC, if the driver remains out of date, it may cause malfunction and cause problems such as not recognizing it.Also, if you are using a Windows computer, Windows updates are performed periodically, and external devices such as external hard drives and USB memory may become unrecognizable after remediation.If you are using a Mac computer, the driver may be damaged even after installing the application, and the external hard drive may not be recognized.If a problem occurs after Windows Update or after installing a new application, updating the driver to the latest version may easily resolve the problem.If you don′t know how to update your drive, please proceed to the next section for further explanation.
External hard drive is powered on but not recognized
If the external hard drive lamp is on and appears to be powered on, but the computer does not recognize it, try using Device Manager to make sure the hard drive is detected correctly.
·How to check external hard drive status using Device Manager (Windows 10)
①Right-click the Windows mark at the bottom left of the screen → Select Device Manager
②Double-click Disk Drive and Universal Serial Bus Controller
③The drive appears if the hard drive is recognized correctly by the computer.
In Device Manager, when a hard drive is detected but data cannot be accessed or folders or files cannot be opened, a logical failure occurs, and a driver failure, duplication or change of drive letters, can be assumed to be causing symptoms.
·If the external hard drive is not displayed in Device Manager,
①Device Name Does Not Appear in Device Manager Screen
②The name of the device is preceded by ′Surprise Mark,′ ′!′ ′Hatena Mark,′ and ′?′
When checking the status of the external hard drive using Device Manager, if there is a problem such as の or 自体, the device itself cannot be loaded correctly on the computer, and the device is not working properly.
デバイス If the external hard drive is not displayed in Device Manager, the disk itself is often out of order, and it is often irreversible just by turning on the power or reseating the cable.The top priority is to remove the disk immediately from the computer to prevent it from deteriorating.
·4 examples of troubleshooting that can be tried when an external hard drive is not displayed in Device Manager
Windows computers are regularly updated.External devices such as external hard drives may become unusable after remediation.If you do not see the equipment in Device Manager, you will need to take the following actions:
①Update and reinstall drivers
②Uninstalling Updates
③Performing System Restore
④restore to its initial state
デバイス If the device manager does not recognize the external hard drive or the device name is not displayed, it is necessary to consider taking action from ~ to の, but these actions are dangerous acts that can cause the stored data to be lost, so be careful.Proceed only if you have received sufficient backups in advance.If, by any chance, there are even a few factors of concern, such as not getting a backup or not getting enough, it is better to prioritize consulting with a professional data recovery company without forcing it.In particular, if you restore the system or restore it to its initial state, the data stored on your computer will disappear, so be careful not to make it easy.
·How to update driver software to the latest version using Device Manager
Update the driver to the latest version when the external hard drive is properly recognized.
①Right-click the Windows mark at the bottom left of the screen → Select Device Manager
②Double-click Disk Drive and Universal Serial Bus Controller
③Right-click the driver listed.
④Select ′Update Driver Software′ to perform the update
·How to check the status of an external hard drive in the disk utility (for Macs)
①Launch Finder
②Click Move from the top menu
③Click Utilities
④Select Disk Utility to Boot
⑤The drive appears if the hard drive is correctly recognized by the Mac.
[National Response] For free data recovery consultation, click here.
What to do if an external hard drive is not recognized (in the event of a logical failure)?
If you are aware of the external hard drive itself, but you may not have access to the files or folders that you have stored, and you are confident that your file system or data is corrupted or that you are not experiencing a physical failure, you may want to try the following:
Workaround 1. Use CHKDSK command to repair
Workaround 2. Change Access Permissions
Workaround 3. Eliminate duplicate drive letters
Workaround 4. Formatting
Workaround 5. Use data recovery software
Workaround 1. Use CHKDSK command to repair
If an external hard drive connected to a Windows 10 or Windows 11 computer is not recognized, a ′command prompt′ may be used for repair and recovery.
·Procedure to repair the disk using CHKDSK (Windows 10)
①Type cmd in the search box to the right of the Windows mark.
②View search results and right-click Command Prompt
③Select Run as Administrator → Open command prompt screen
④Enter the chkdsk external hard drive name d:/F on the command prompt screen.
⑤wait for a while
⑥Repair completed
CH CHKDSK (check disk) refers to the ability to repair the file system.If the file system on the disk fails or is damaged, this CHKDSK may return to normal operation, but CHKDSK rewrites the error area and discards any data that cannot be repaired.You should also be careful because if the data itself fails, the data disappears.If the data stored on the hard drive disappears, disappears, or cannot be taken out, even a little bit of a problem occurs, you should give priority to consulting a professional data recovery company before doing CHKDSK.You can prevent failure.
論理 If CHKDSK is performed when there is a physical failure on the disk instead of a logical failure, the situation will become serious.CHKDSK itself often takes about 30 minutes to complete, and during that time, the disk continues to be loaded, resulting in severe failures and complete breakdown of broken objects, which can lead to regret.If you want to restore it quickly and cheaply, don′t try it easily.
↓ If you want to retrieve data from your hard drive, please refer to this as well.
AT DATA RECOVERY MEDIUM
What do I do when I want to retrieve data from a failed hard drive?
https://www.adte.jp/rec/hdd/post-1307/
Hard drives are the most prone to failure among server components such as personal computers and NAS.A hard drive is one of the recording media that stores important data, and if it is broken, data can be lost, so be careful when handling it.Here′s how to retrieve and troubleshoot data in the event of a hard drive failure.
Workaround 2. Change Access Permissions
The model number appears, but I can′t see the data inside, I can′t open the file, Icons appear on my computer, but I can′t access it, and if I get an error message ′Access Denied′, I may be able to fix the problem by changing my access privileges.You can change the settings screen and access privileges using the following methods:
業務 When using a company-owned PC for business, the HDD itself may not be accessible even if it is recognized.If you do not have access, you will not be able to connect, so contact your system administrator for equipment owned by your company.
·How to change access rights (Windows)
①Right-click the file or folder where you want to change access privileges.
②Displayed menu → Select Properties → Select Security tab
③Select the name of the group or user you want to change permissions for.
④Click Edit
⑤Group name or username field → Click the account you want to allow access to
⑥Check the items you want to allow access from the permission field → Press OK
⑦Uncheck items that you want to grant permission to when a deny item is checked.
⑧Access rights are changed
·How to change access rights (macOS)
①Apple Menu → Click ′System Preferences′ → Select ′Security and Privacy′ →
②′Select ′′Files and Folders′′ from the contents displayed on the left′·Click
③Check the permission field for access to files and folders to the application below → Check the check box under the application you want to grant access to
④be granted access to files and folders
Workaround 3. Eliminate duplicate drive letters
When an external hard drive is connected to a computer, a drive letter (drive letter) such as E or H is assigned.If you use or reseat multiple peripherals on your computer, the drive letters (drive letters) may be duplicated or misaligned and may not be recognized correctly.Disk management is used to edit and restore drive letters.·How to change the drive letter (Windows)
①Click Windows Mark → Application List → Windows Management Tools → Computer Management → Disk Management in the Storage column
②Right-click the drive you want to change → Click Change drive letter and path → Select drive letter you want to change → Click Change
③Drive Letter or Path Changes Appear → Click Assign Next Drive Letter → View the list and click the drive letter you want to assign → Press the OK button
④Some programs that depend on the drive letter may not work properly.Message displayed → No problem determined → Press Yes
⑤US>Return to Computer Administration to see if the drive letter has changed and complete
The drive may not be recognized and an error message will be displayed when the image is imported to an external hard drive ·When the OS is automatically backed up to an external hard drive, the drive may not be recognized.Basically, you can choose any drive letter as long as it doesn′t overlap.If you change the drive letter, check the settings of the image capture software and the backup software again, and do the necessary designation.Duplicate drive letters are one of the most common problems with external HDDs (NASs) used on the network.Editing a drive letter is a workaround that also includes the risk of data never being recovered if you make a mistake.If you have any concerns, stop and contact a company specializing in data recovery before proceeding.
Workaround 4. Formatting
When connecting an external hard drive to a computer, the disk icon may appear but the contents may not open.In particular, when you try to use a new external hard drive made overseas, you may not recognize it because it has not been initialized.
·If the new external hard drive is not recognized, check if it has been formatted.
Format (initialize) if you haven′t saved any data on an external hard drive yet or if you don′t recognize it when it′s connected to your computer while it′new state.
·How to check if a new disk is formatted
①Click on an external hard drive folder → Access it
②Determine if the Error Message ′Drive Not Accessible′ or ′Disk Not Formatted′ Appears
*If an error message is displayed in で, it will be a sign that requires initialization and formatting.
·Failure sign if formatting error is displayed on external hard drive in use
①′It needs to be formatted.Formatting? (Windows Error Message)
②′The disk I set was a disk that this computer could not read.′ (macOS error message)
データ If an error message of ② or の is displayed when connecting an external HDD storing data to a PC, the disk itself will be a sign of failure.If you format and initialize in this state, all the data inside will disappear, so be careful not to do so.In the unlikely event that you format it incorrectly, you should consult with a professional data recovery company immediately without unnecessary action.
↓ If you are having trouble with the error message ′You need to format it′, please refer to this as well.
AT DATA RECOVERY MEDIUM
It must be formatted.Here′s how to deal with errors!
https://www.adte.jp/rec/hdd/post-862/
When connecting an external hard disk, SD card, USB memory, etc. to a PC, the error ′Must be formatted′ or ′Do you want to format?′ may appear.Don′t panic if you can′t see the data stored on an external hard drive without opening the drive.If you see the error ′Must be formatted′, we will show you how to recover and resolve the data.
·When you want to format the data in the external HDD without needing it
After the error message is displayed, if you don′t need the data in the disk and you want to return to the device itself to work, or if you want to format a new external hard drive, you can initialize it using the following methods:
·How to format and initialize an external hard drive (Windows)
①Right-click the Windows mark
②Select Disk Management
③Right-click an external hard drive from the window provided.
④Select ′Format
フォーマット Formatting and initialization refers to the work of restoring the equipment to its original factory condition.Formatting may cause unrecognized disks to return to operational status, but you should be careful because more often than not.Also, if you format it, all the saved data will disappear, so don′t try it if there is a possibility that there is at least one file or folder you need.
·How to format and initialize an external HDD (macOS)
①Launchpad→Other→Launch Disk Utility
②Select the volume you want to format from the sidebar
③Click Clear → Select Format
Workaround 5. Use data recovery software
If the external hard drive is not recognized and the cause is only mild logical failure, data recovery software can be used to resolve the problem.However, when external HDDs are not recognized or read, there are many cases where there are more than moderate logical or physical failures.It is often difficult for individuals to determine the degree of disability (mild, moderate, or severe) and the type of disability (logical or physical), and if they use recovery software easily, they may end up in an irreversible situation.If the data you have saved is important, if you can′t retrieve it or recover it, you don′t want to fail, you want to reduce costs, solve problems quickly, and minimize business disruptions, you should stop trying the recovery software.If you really want to use the recovery software, consult a professional data recovery company before proceeding.
·Examples of how to use restoration software
①install recovery software on one′s computer
②open recovery software
③Select the hard drive you want to recover
④Click Scan → Files Scanned
⑤Preview Discovered Files
⑥Select the data you want to recover → Click the restore button, recovery button, etc.
⑦verify restored data
·Examples of restoration software
Examples of free recovery software Examples of paid versions of recovery software Examples of OS support
Recuva/iSkysoft/Disk Digger/PC Inspector File Recovery/Recoverit/EaseUS Data Recovery Wizard/testdisk/Mini Tool Photo Recovery Free/Pandora Recovery/ AVIPreview/Recover Files/Restart Explorer/MMname/Photo Rec/ZAR（Zero Assumption Recovery）/Glary UndeleteSFWare Video Repair/DivFix/WMVConcat/VLC Media Player/ AviFIXP/4DDiG/DVDVob2Mpg/Stellar Repair for Videoなど Disk Drill/iSkysoftPaid/EaseUS Data Recovery Wizard, Recoverit Paid/SFWare Video Repair/Data Recovery/restore.media/Renee Undelete, Windows/macOS (iOS)/Linux, etc.
· Advantages and disadvantages of using data recovery software
advantages of using softwaredisadvantages of using software
Recovery software can′t be used in the first place due to aging or physical failure, such as easy to use/cheap to restore, often deteriorates as a result of using software/using software/scanning data/using software/using software to recover completely/restore files/restore files.
Avoid using the recovery software if you are worried that the data stored on an external hard drive is important, that you can′t retrieve it, that you can′t recover it, or that you don′t want to fail.The disadvantages of trying recovery software are more noticeable than the advantages.Just installing the software can have a negative effect.It is important to stop when you are looking for software and when you are having trouble or worry even if you scan halfway.If you have any concerns, consult a professional data recovery company.You don′t have to regret it.
What to do if an external hard drive is not detected (in the event of a physical failure)?
The external hard drive′s power lamp is on, but it is not recognized on the connected computer, clicking noise, not working, dropping the hard drive, suspected aging of the hard drive, etc., should be careful.When an external hard drive becomes unrecognized, it is overwhelmingly a physical failure, not a logical failure.Error message displayed ·Icons appear, but files and folders do not open, and many symptoms that tend to be considered logical failures can be physical failures, and logical failures and physical failures can occur together.
↓ If the hard drive has an error or a message appears, please also check the corrective action.
AT DATA RECOVERY MEDIUM
HARD DISK ERROR CHECKING AND RECOVERY METHOD
https://www.adte.jp/rec/hdd/post-1218/
Have you ever been confused by an error on your computer while using a hard disk?If a hard disk fails, such as ′A hard disk problem has been detected,′ don′t panic and check one by one.This section describes how to repair an error message when using a hard disk or when an error is detected.
·What to do if you think that an external hard drive is experiencing a physical failure?
Workaround パソコン Remove the external hard drive from the computer
Workaround 電源 Turn off the power
Solution データ Contact the data recovery and repair company
If you have important data on your disk, you don′t want to take it out safely, you don′t want to fail, you want to solve the problem quickly, you′re concerned about the cost, you want to reduce recovery costs, and so on, give priority to using a free consultation from a professional data recovery company.
*If you send it to the manufacturer′s repair, you should be aware that the equipment is usually initialized or replaced with a replacement, and that the data will not be rescued or disappeared.Also, when you request a manufacturer repair, you may need to wait weeks or months for the equipment to be returned to you, so if you want to solve the problem quickly, you should prioritize consulting a data recovery company first.
·How to select a data recovery company
If you need or want to rescue data from external hard drives that are not recognized or read, we recommend that you choose a way to resolve the problem by consult a professional data recovery company.When you consult with a data recovery provider, you have deep expertise and advanced technology to identify the cause, type, extent, and location of the symptom, and to be able to respond to logical or physical failures.However, there are many companies that provide data recovery services, so you may be worried about which company to consult.In such a case, let′s check the following points before choosing.
①Does the organization have proprietary or AI technology (a guide with advanced technology)?
②What is the speed of recovery and how long does it take to work?
③Is the fee plan and restoration fee example listed on the website?
④Does the organization have a dedicated environment such as a clean room?
⑤Are information confidentiality obligations and security measures thorough?
⑥Whether or not there are any restoration results or cases
Not all recovery companies can do the same.Please be careful not to choose easily because it′s close to your house or company.There is also a big difference in technical capabilities and service content from company to company to company.By any chance, if you send it to a company without technical capabilities, not only will it be difficult to solve the problem, but it will not be able to recover, and the condition may deteriorate.Advanced Technology is a data recovery service company that meets all of the points ~ through の.With AI technology and proprietary technology, we are able to respond quickly and restore data at a low cost thanks to our advanced technology.I feel safe because I have a lot of experience with various recording media such as HDD, NAS, and SSD.
[National Response] For free data recovery consultation, click here.
What to Do When an External Hard Drive Is Not Recognized
Even if the external hard drive is not recognized or the PC is not loaded, in most cases the data remains on the disk.However, if you do the following things, things that could have been restored quickly and cheaply may end up in an unrecoverable situation.Let′s be careful.
Continuing to power on and repeatedly turning on and off the power supply is not allowed.
Repeated USB cable or AC adapter reseat is dangerous
Avoid connecting multiple PCs
Decomposition and opening are not allowed.
You can′t hit or shock.
Data recovery software is dangerous
Individual repair and restoration work is risky.
1. Continuing to energize · Repeated power-on/reboot is not allowed.
If the external hard drive is not recognized or loaded, パソコンRemove from the computer 電源Power off should be prioritized.If you leave it connected to the computer, the power will be turned on, and the disk may malfunction or overwrite.Also, if you repeat what you can do easily, such as turning off or restarting the power, the condition becomes serious and you often end up in an irreversible situation.
2. Repeated USB cable or AC adapter insertion and removal is dangerous
If the external hard drive does not load, you may often reseat the USB cable or AC adapter over and over again, but you should also be aware that this is a dangerous behavior.Reseating and reseating often causes fatal damage to the disk as well as turning it on and off.
3. Avoid connecting multiple PCs
If you have several PCs or if your company has many PCs that you can connect to, or if the external hard drive does not recognize it, you may try to connect to multiple PCs to see if the problem can be resolved.However, these actions are also very dangerous.Just like plugging in and out of cables or turning off power, don′t make it easy to try because it can be a disk-intensive operation that not only solves the problem but can also cause serious situations.
4. Decomposition and opening are not allowed.
The HDD is made up of a variety of components, and it is one of the most delicate precision instruments that makes it impossible to recover from dust or dust.Therefore, it is necessary to work in a dedicated environment such as a clean room to decompose and open.It′s the same image as performing human surgery in a special operating room.Attempting to dismantle and repair equipment such as HDDs outside of a dedicated environment can be a dangerous act that can cause serious conditions.Also, if you open it easily by yourself, it may not be covered by the manufacturer′s warranty. I want to check the cause of the trouble, and if I go ahead with the work recklessly to see if I can handle it myself, it will lead to regret.You should not take it apart or open it.
↓ If you would like to repair your hard drive, please refer to this as well.
AT DATA RECOVERY MEDIUM
Learn how to repair your hard drive and recover your data!
https://www.adte.jp/rec/hdd/post-914/
It is possible to determine if the hard drive is faulty due to symptoms such as an error message, noise, corrupt files, burning smell, and so on while using the hard drive.This section describes how to repair or repair a hard drive in the event of a hard drive failure.
5.You can′t hit or shock.
HDD is one of the precision instruments.Be careful not to give a shock when any symptoms or troubles occur.The situation will get worse soon.
6. Using data recovery software is dangerous / 7. It is risky to carry out repair and recovery work by individuals
If the external hard drive is not recognized, careful attention is required.In many cases, physical problems often occur, and the disadvantages are noticeable, such as overwriting the data if you use the data recovery software easily and having other symptoms.The more difficult it is to retrieve data, the more serious the situation can be, as a result of repeated easy-to-use activities such as power cycling, rebooting, and reseating cables.If you want to do what you can or want to try, give priority to stopping.If you really want to proceed with some work or operation, you can avoid regret by consulting a professional data recovery company.
Summary - In case of trouble
An external hard drive is one of the recording media that often causes problems such as not recognizing or reading.It is important to turn off the power when the hard drive has any symptoms.If you proceed with unnecessary operations or work, the data will disappear and it may become difficult to take out.There are many situations where it is impossible to recover just by turning on and off the power, restarting, and reseating the cable.If your external hard drive contains important data, wants to solve problems quickly, wants to reduce costs, worries about recovery costs, or doesn′t want to fail, don′t do anything unnecessary and consult a professional data recovery company.Advanced technology has its own technology and AI technology, and advanced technology for restoration and repair operations enables quick response and low-cost data recovery.I′m relieved because I have a lot of experience.If you are in trouble, why don′t you start with a free consultation?
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